---
title: SLS Operation Statistics
description: Weekly and anual operation statistics for the SLS are given here
template: main.html

hide:
  - toc
---

<!-- based on old definition Andreas published at http://gfa-operation.intranet.psi.ch/kr/sls/sls_opstat.php
Here are our definitions:
Downtime: time between beam loss (Ibeam < 20mA) and full recovery (Ibeam >= Inominal = 400 mA).
Short-uptime-rule: if two beam outages have less than 1 hour of uptime in between, it is counted as one long downtime.
Scheduled-user-time: this time is distributed between the accepted user proposals
Scheduled-user-reserve-time: additional user time, provided to compensate for beam outages
User-Time: Scheduled-user-time + Scheduled-user-reserve-time
Delivered-beam-time: User-Time - Downtime
Total-downtime: Sum over all individual Downtime of one year
Number-of-faults: Count of all individual Downtimes
Number-of-distortion = Incidence count of Downtimes, beam drops and orbit feedback failures (introduced 2004)
Availability: Delivered-beam-time / User-Time.
Availability after compensation: Delivered-beam-time / Scheduled-user-time.
MTBF: Mean Time Between Failures = User-Time / (Number-of-faults + 1)
MTTR: Mean Time To Recover = Total-downtime / Number-of-faults
MTBD: Mean Time Between Distortions = User Time / Number-of-distortion
 -->

??? info "Definitions used for the presented statistics"
    * **Scheduled-user-time:** this time is scheduled upfront and distributed between the accepted user proposals
    * **Reserve-time:** additional user time, provided to compensate for beam outages (often scheduled mid and end of year, not always used for user operation)
    * **User-operation:** Scheduled-user-time + Reserve-time
    * **Downtime:** time between beam loss (Ibeam < 20 mA) and full recovery (Ibeam >= Inominal = 400 mA) during user-operation
    * **Short-uptime-rule:** if two beam outages have less than 1 hour of uptime in between, it is counted as one long downtime.
    * **Total-downtime:** sum of all individual downtimes of one year
    * **Total-beam-time** sum of all scheduled beam times (user, beamline, machine, ...)
    * **Machine development** sum of scheduled beam times (user, beamline, machine, ...)
    * **Delivered-beam-time:** User-operation - Total-downtime
    * **Number-of-faults:** incidence count of all individual Downtimes
    * **Injector-outage-time:** time between beam drop (Ibeam < 390 mA) and full recovery (Ibeam >= Inominal = 400 mA) during user-operation
    * **Number-of-distortions:** incidence count of faults and beam drops, orbit feedback failures, low beam-lifetimes (tau < 8 hours), beam blow ups (sigy > 15 um) and distorted filling patterns
    * **Availability:** Delivered-beam-time / User-operation
    * **Availability after compensation:** Delivered-beam-time / Scheduled-user-time.
    * **MTBF:** Mean Time Between Failures = User-operation / (Number-of-faults + 1)
    * **MTTR:** Mean Time To Recover = Total-downtime / Number-of-faults
    * **MTBD:** Mean Time Between Distortions = User Time / Number-of-distortion

    More information is available in [Phys. Rev. Accel. Beams 19, 082802](https://doi.org/10.1103/PhysRevAccelBeams.19.082802) and [here](http://gfa-operation.intranet.psi.ch/kr/sls/sls_opstat.php).

## 2025

| **DUO Schedule**                                   |||
| :------------------------- | :---------- | :-------- |
| **Time**                   | **Hours**   |  **%**    |
| Scheduled-user-time        |      912    |    10.5   |
| Reserve-time               |       48    |     0.5   |
| **User operation**         |   **960**   | **11.0**  |
| <!--                 --> |
| User operation             |      960    |    11.0   |
| Beamline development       |     1824    |    20.8   |
| Machine development        |     3192    |    36.4   |
| **Total beam time**        |  **5976**   | **68.2**  |
| <!--                 --> |
| Total beam time            |     5976    |    68.2   |
| Shutdown                   |     2784    |    31.8   |
| **Total**                  |  **8760**   | **100.0** |

| **Delivery for total beam time**   ||
| :----------------------- | :------- |
| Average beam current     | 299 mA   |
| Circulating beam dose    | 1590 Ah  |
| Injected charge          | 659.3 μC |

| **Quarterly Beam Dose for Dosimetry**       ||
| :------------------------------- | :-------- |
| **Q1** (11.12.2024 - 19.03.2025) | 22.4 Ah   |
| **Q2** (19.03.2025 - 18.06.2025) | 450.1 Ah  |
| **Q3** (18.06.2025 - 17.09.2025) | 499.7 Ah  |
| **Q4** (17.09.2025 - 10.12.2025) | 512.5 Ah  |

| **Delivery for User Operation**             ||
| :------------------------------ | :--------- |
| User operation                  | 960 hours  |
| Total downtime                  | 54.1 hours |
| Number-of-faults                |   49       |
| Availability                    | 94.4 %     |
| Availability after compensation | 99.3 %     |
| MTBF                            | 19.2 hours |
| MTTR                            |  1.1 hours |


# DUO Statistics


## 2025

![Pie Chart DUO 2025](data/duostats2025.png){ style="height:400px;" align=left }

| **Time**                 | **Hours**   |  **%**    |
| :------------------------| :---------- | :-------- |
| {{shutdown}}             |     2784    |    31.8   |
| {{machine}}              |     3192    |    36.4   |
| {{beamline}}             |     1824    |    20.8   |
| {{user}}                 |      960    |    11.0   |
| **Total**                |  **8760**   | **100.0** |

<div style="clear: both;"></div>


## 2026

![Pie Chart DUO 2026](data/duostats2026.png){ style="height:400px;" align=left }

| **Time**                 | **Hours**   |  **%**    |
| :------------------------| :---------- | :-------- |
| {{shutdown}}             |     4360    |    49.8   |
| {{machine}}              |     1632    |    18.6   |
| {{beamline}}             |     1032    |    11.8   |
| {{user}}                 |     1736    |    19.8   |
| **Total**                |  **8760**   | **100.0** |

<div style="clear: both;"></div>


## 2027

![Pie Chart DUO 2027](data/duostats2027.png){ style="height:400px;" align=left }

| **Time**                 | **Hours**   |  **%**    |
| :------------------------| :---------- | :-------- |
| {{shutdown}}             |     2304    |    26.3   |
| {{machine}}              |     1904    |    21.7   |
| {{beamline}}             |      960    |    11.0   |
| {{user}}                 |     3592    |    41.0   |
| **Total**                |  **8760**   | **100.0** |

<div style="clear: both;"></div>


## Beam Delivery Statistics